Question

How many plates of 100 m^2 is
required to cover a field of 10 km^2 Area?​

Answer 1

Area A=100㎠=100×10

−4

㎡

Thickness dx=2㎜=2×10

−3

m

Co efficient of viscosity=15.5 poise=1.55pa

Velocity=3㎝s

−1

=3×10

−2

㎧

F=ηA(

dx

dv

)

=

2×10

−3

15.5×10

−1

×100×3×10

−4

×10

−2

=

10

−5

23.25×10

−7

F=0.2325N